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org.apache.derby.impl.io
Class DirRandomAccessFile4  

java.lang.Object
  java.io.RandomAccessFile
      org.apache.derby.impl.io.DirRandomAccessFile
          org.apache.derby.impl.io.DirRandomAccessFile4

All Implemented Interfaces:

java.io.DataInput, java.io.DataOutput, org.apache.derby.io.StorageRandomAccessFile

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class DirRandomAccessFile4

extends DirRandomAccessFile

This class provides a disk based implementation of the StIRandomAccess File interface. It is used by the database engine to access persistent data and transaction logs under the directory (default) subsubprotocol. This class extends DirRandomAccessFile to use the java.nio.channels.FileChannel.force() method to implement sync(). Java.nio.channels.FileChannel was introduced in Java 1.4; it was not available in Java 1.3.

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Field Summary

 

Fields inherited from class java.io.RandomAccessFile

 

Constructor Summary
(package private)	DirRandomAccessFile4(java.io.File name, java.lang.String mode)           Construct a StorageRandomAccessFileImpl.

 

Method Summary
void	sync(boolean metaData)           Force any changes out to the persistent store.

 

Methods inherited from class java.io.RandomAccessFile

close, getChannel, getFD, getFilePointer, length, read, read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, seek, setLength, skipBytes, write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Methods inherited from interface org.apache.derby.io.StorageRandomAccessFile

close, getFilePointer, length, seek, setLength

 

Methods inherited from interface java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

 

Methods inherited from interface java.io.DataOutput

write, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

 

Constructor Detail

DirRandomAccessFile4

DirRandomAccessFile4(java.io.File name,
                     java.lang.String mode)
               throws java.io.FileNotFoundException

Construct a StorageRandomAccessFileImpl.

Method Detail

sync

public void sync(boolean metaData)
          throws java.io.IOException

Force any changes out to the persistent store.

Specified by:

sync in interface org.apache.derby.io.StorageRandomAccessFile

Overrides:

sync in class DirRandomAccessFile

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